Jacob weimar



as indicated, on the .line a: 2:.

diniwt ems piano carp JACOB WElMAR, OF MOUNT VERNON, NEW YORK.

Letters Patent No. 94,156, dated August 24, 1869.

rmpnovemnu'r 11v PERMUrATIoN-LooKsr The Schedule referred to in these Letters Patent and making part ofthe same.

To all whom it may concern.-

Be itknown that I, J AcoB' WEIMAR, of Mount "ernon, in the county of \Vestchester, and State of New York, have invented a new arid useful Improvement in Safe and other Locks, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification, in which- Figure 1 is a vertical face view of the interior of a- Similar letters of reference indicate corresponding parts in the several figures.

This improvement relates to looks of a permutation character, the same being either applicable as a lock, independent of any other fastening, or as a check or locking-bolt to another look; and i g It consists in a novel arrangement of two cams, and any desirable number of circular gate-tumblers, and a hinged or pivoted latch or stop, which latter isallowed to drop when said tumblers are placed in a certain position, in manner. hereinafter described.

To enable others skilled in the art of constructing looks, I will proceed to describe my invention, by reference to the drawing, in which-' Arepresents the lock-case, designed to be firmly secured to the inside of the safe or its door.

a is the inside plate to the lock,tl 1e same being fastened to the latter in the usual way.

B is a bush, permanently fitted to'the case through which the knob-spindle Gis inserted.

c is acollar, which is formed on the spindle to. retain it in its proper posit-ion in the case.

Attached to an outward extension of the spindle G, inside of the knob l), is a dial-plate, E, that is marked or divided on its circumference, whereby, on bringing certain of such marks or divisions, (by turning the knobspindle,) opposite a: certain fixed mark on the safe, front, the tumblers are rotated to the necessary position to allow the bolt or' stop L to fall to the position represented in F is a cam, mainly of circular form, but having abbut one-fourth of its circumierence flattened or cut away, as at 'b, and'is firmly secured to the spindle 0, so as to turn with it.

, Said cam is also'provided with a driving-stud, d, on its inner face, and works against a similarly-shaped cam, G, arranged to turn loosely on the bush B, and having, also, a flattened portion, 6, at its periphery.

This latter cam G is provided with a recess, f, on

the side toward the cam 1*, into which a concentric,

loose disk, g, is fitted, that carries a stud, h, for the stud (l of the first cam to strike against, by which the cam G isturned, the disk gbeing moved so as to bring the one end of a slot, i, in it against the studj, which is fast to the cam G.

This slot 1', .in the loose disk g, is essential. to cause the dial to indicate the same number or division at the moment the driving-stud (Z 'comes in contact with the stud h, whether-it be turned to the rightor to the left.

The cam G is furthermore provided, on its opposite flface, witha drivingestud, h, to engage with the stud l on a to'othed plate or disk, m, arranged within a ringtumbler, H, constructed with a slot or gate, h, and'to which it is geared by a pawl, or, that is held in place by a spring, 0, both being fitted to the tumbler H, which may freely turn on the bush B.

The. disk at is also provided with a driving-stud, p, I

thatengages with the ring tumbler I, constructed similarly to the tumbler H, and havinglike attachmerits or devices.

cured to the'case A, and, on the-several tumblers being brought into proper position, falls on the flattened portions b and e of the tumblers 1i and G, the bar 0', projecting from the bolt, entering the slots or gates h of the ring-tumblers H I J.

The cam G being the last one set to position, when it is desired to unlock the door, it, together with the cam F, forms a complete circle, on which the latch or bolt rests during the manipulation of the gate-tumblers, and until it (the cam G) is in position, when, by moving the knob slowly in the reverse direction from that by which the cam G was set, until the flattened portion of cam 1 is brought upward, the latch or bolt is allowed to. drop.

By this'constr uction and arrangement of parts, a safe, cheap, and simple permutation lock can be made. 1 The operation for setting the tumblers, when in an unlocked position, to eflect a new combination of marks and numbers, by'means of the knob-spindle, is

as follows:

Akey, M, constructed as shown inifig. 5, is inserted through holes provided in the inner case-plate, and

the several dividing-plates and ring-tumblers, to lift the several'pawls out 'of gear,bya quarter turn, there- -by enabling the disks m, of the ring-tumblers H, I,

and J, to be set, so that when certain marks or numbers on the dial-plate come opposite a fixed mark on the safe-front, the tumblers will be in anunlockingposition.

For example, suppose the ring-tumblers to occupy an unlocking-position, when the first or outermost three complete rotations, and until the number 20' comes opposite the fixed mark the fourth time, which sets the second tumbler'I in position, then" rotate again to the'right until nurnher30 comes opposite the fixed mark the third time, thereby setting the third tumbler H, after which, revolve in an opposite direction yet again, until 0 comes opposite the mark. the second time; this sets the fourth tumbler or cam G. Then turn from left to right slowly until the bolt drops, that is, until tumblerF comes in position to allow the bolt turned back again, and withdrawn to allow the pawls n to lock the disks m with the ring-tumblers, which, by the operation just described, have now come in an unlocking-position. The key is only used when a change is required. The changes may be innumerable, as may be readily seen.

necessary to give the knob three or nioreturns in one direction to lock the door, which can onlyhe unlocked by working the combination last set, in the manner before described.

It should be observed, that in this construction of lock, the onlymotion, in looking or unlocking, is a rosary, as in other locks of similar character.

What I claim, and wish to secure by Letters Patent, is

gate-tumblers H I J, and lever-catch L, all constructed and operating substantially as set forth.

JACOB WEIMAR.

\Vitnesses:

A. LE CLERC, Enwn. PLTRACY.

Lto drop on its flattened portion. The key is then When a combination is thus made, it is only-v tary one, as no sliding motion of the spindle is neces- The ariaugemeut of the cam tumblers F and G, the 

